trigonometric identities sin cos

1. sin A = cos (90 o - A). 2. sin A / cos a = tan A. 3. tan A x tan (90 o - A) = 1. 4. sin 2 A + cos 2 A = 1. 5. 1 + tan 2 A = sec 2 A. 6. 1 + cot 2 A = cosec 2 A. Where 'A' is the angl..

1. sin A = cos (90 o - A) 2. 3. tan A x tan (90 o - A) = 1 4. sin 2 A + cos 2 A = 1 5. 1 + tan 2 A = sec 2 A 6. 1 + cot 2 A = cosec 2 A Let us prove the above identities. Let D ABC be a right-angled triangle with B = 90 o . Let BC = ..

sine A means sine of angle A. (i) sin A is not sine x A (ii) sin A + sin B sin (A + B) (iii) sin A + cos A (sin + cos)..

Introduction - The trigonometric ratio's are: Sine, Cosine, Tangent, Cotangent, Secant, and Cosecan..

Conditional Trigonometric Identities - In the previous sections many identities have been discussed. They are true for all values of the angles for which trigonometric functions are defined. In this section we prove identities, where a certain relat..

In the previous sections many identities have been discussed. They are true for all values of the angles for which trigonometric functions are defined. In this section we prove identities, where a certain relationship exists among the angles considered. Many interestin..

A trigonometric equation is an equation involving the trigonometric functions of unknown angles. Example; sin x = 1/..

. We write the ordered pairs of this function as ( q , P( q )). Let q be any real number and let the co-ordinates of P( q ) be (x,y). We define the cosine function of q (written as cos q ) and sine function of q (written as sin q ). In term of the co-ordinates of the trigon..

The Values of Trigonometric Functions of 90 o and 0 o are: cos90 o = 0, sin90 o = 1, tan90 o = Not defined, sec90 o = Not defined, cot90 o = 0, cosec90 o = 1, cos0 o = 1, sin0 o = 0, here cosec0 o and cot0 o are not defined, sec0 o..

The following table shows the Trigonometric ratios of Allied Angles: - q 90- q 90 + q 180- q 180 + q 270- q 270 + q 2n P - q 2n P + q sin q -sin q cos q cos q sin q -sin ..